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The concept of a synergistic effect is given - the appearance of properties in the system that are not inherent in its elements separately, that is, the irreducibility of the properties of the system to the sum of the properties of its components. The definition of those factors, components of the participants in the synergistic effect: photosynthesis and mineral nutrition is given. The prerequisites for creating a software algorithm for the implementation of a synergistic effect in the production processes of plants are substantiated. The task of the algorithm is to track the moment when the difference between the temperature of the vegetative organ and the external temperature reaches its maximum, while both conditions for the efficiency of the production process will be observed: the maximum nutrient consumption through the plant and the maximum rate of photosynthesis. This leads to the formation of a synergistic effect. The algorithm provides a search for this difference. A description of the operation of the program algorithm is presented. The purpose of this research is to experimentally verify the operation of the software according to the developed algorithm and the presence of a synergistic effect provided by this algorithm. Lettuce culture "Azart" was used as the object of research. The experiment was carried out from May 31, 2022 to June 28, 2022 with fixation of biometric indicators. The following indicators were taken as indicators: leaf weight (wet), leaf weight (dry), leaf area and number, plant height. Mean scores were calculated from the scores of each of the six plants in the Algorithm/Plant study boxes. A specially designed stand was used for research. The stand consists of two boxes for placing the test samples in them, in one of which the mode was controlled according to the developed algorithm (upper box), and in the other according to the usual scheme that supports the tabular optimal factors for a given culture by air temperature (lower box). Comparison of productivity indicators revealed the presence of a synergistic effect in the management of the modes of production processes according to an algorithm that ensures the cooperative interaction of photosynthesis and effective mineral nutrition. The algorithm operation schedule is given based on the selected experimental values of climatic indicators from 7:12 to 12:00. The graph shows the mode of satisfactory operation of the developed algorithm in real time.
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